Buku Teks
Halpin, Daniel W., author
John Wiley & Sons, 1980
Buku Teks
compiled by David R. Hampton
Prentince-Hall of India, 1979
Buku Teks
Barrie, Donald S., author
McGraw-Hill, 1978
Buku Teks
Clough, Richard Hudson, author
John Wiley & Sons, c1991
Buku Teks